<template>
  <view>
    <my-search @myclick="gotoSearch"></my-search>
    <view class="scroll-rool-container">
      <scroll-view scroll-y="true" :style="{height: wh+'px'}" class="left-scroll-view">
        <block v-for="(item,i) in cateList":key='i'>
          <view :class="['left-scroll-view-item',i==active?'active':'']" @click="activeChanged(i)">{{item.cat_name}}</view>
        </block>
      </scroll-view>
      <scroll-view scroll-y="true" :style="{height: wh+'px'}" :scroll-top="scrollTop">
        <view class="cate-lv2" v-for="(item2,i2) in cateLevel2":key='i2'>
          <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
          <view class="cate-lv3-list">
            <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key='i3' @click="gotoGoodsList(item3)">
              <image :src="item3.cat_icon.replace('dev','web')"></image>
              <text>{{item3.cat_name}}</text>
            </view>
          </view>
        </view>
      </scroll-view>
    </view>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    mixins:[badgeMix],
    data() {
      return {
        wh:0,
        cateList:[],
        active:0,
        cateLevel2:[],
        scrollTop:0
      };
    },
    onLoad(){
      const sysInfo=uni.getSystemInfoSync()
      this.wh=sysInfo.windowHeight-50
      this.getCateList()
    },
    methods:{
      async getCateList(){
        const {data:res}= await uni.$http.get('/api/public/v1/categories')
        if(res.meta.status!=200) return uni.$showMsg()
        this.cateList=res.message
        this.cateLevel2=res.message[0].children
      },
      activeChanged(i){
        this.active=i,
        this.cateLevel2=this.cateList[i].children
        this.scrollTop=this.scrollTop==0?1:0
      },
      gotoGoodsList(item3){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?cid='+item3.cat_id
        })
      },
      gotoSearch(){
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
  }
</script>

<style lang="scss">
.scroll-rool-container{
  display: flex;
}
.left-scroll-view{
  width:120px;
}
.left-scroll-view-item{
  background-color:#F7F7F7;
  line-height: 60px;
  text-align: center;
  font-size: 12px;
  &.active{
    background-color: #FFFFFF;
    position: relative;
    &::before{
      content:' ';
      display: block;
      width:3px;
      height:30px;
      background-color: #C00000;
      position: absolute;
      transform: translateY(50%);
    }
  }
}
.cate-lv2-title{
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}
.cate-lv3-list{
  display: flex;
  flex-wrap: wrap;
  .cate-lv3-item{
    width:33.33%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-bottom: 10px;
    image{
      width:60px;
      height:60px;
    }
    text{
      font-size: 12px;
    }
  }
}
</style>
